Screw-in Funnel

This is a simple funnel to secure paint filters while transferring SLA resin to a bottle.
Was design by an office colleague. It screws in RS 250ml PP bottles and fits standard one use paper paint filters (same type offered by formlabs). I have no idea if the botle have standard screw cap or not
It works great, but could be improved to reduce contact between funnel and filter for less cleaning to do and less resin waste.

RS botle: RS-Pro 461-0594 - https://es.rs-online.com/web/p/botellas-para-laboratorio/4610594/